lib/lzo/lzo1x_compress.c

41 		size_t t, m_len, m_off;
162 		m_len = 4;
166 		v = get_unaligned((const u64 *) (ip + m_len)) ^
167 		    get_unaligned((const u64 *) (m_pos + m_len));
170 				m_len += 8;
171 				v = get_unaligned((const u64 *) (ip + m_len)) ^
172 				    get_unaligned((const u64 *) (m_pos + m_len));
173 				if (unlikely(ip + m_len >= ip_end))
178 		m_len += (unsigned) __builtin_ctzll(v) / 8;
180 		m_len += (unsigned) __builtin_clzll(v) / 8;
186 		v = get_unaligned((const u32 *) (ip + m_len)) ^
187 		    get_unaligned((const u32 *) (m_pos + m_len));
190 				m_len += 4;
191 				v = get_unaligned((const u32 *) (ip + m_len)) ^
192 				    get_unaligned((const u32 *) (m_pos + m_len));
195 				m_len += 4;
196 				v = get_unaligned((const u32 *) (ip + m_len)) ^
197 				    get_unaligned((const u32 *) (m_pos + m_len));
198 				if (unlikely(ip + m_len >= ip_end))
203 		m_len += (unsigned) __builtin_ctz(v) / 8;
205 		m_len += (unsigned) __builtin_clz(v) / 8;
210 		if (unlikely(ip[m_len] == m_pos[m_len])) {
212 				m_len += 1;
213 				if (ip[m_len] != m_pos[m_len])
215 				m_len += 1;
216 				if (ip[m_len] != m_pos[m_len])
218 				m_len += 1;
219 				if (ip[m_len] != m_pos[m_len])
221 				m_len += 1;
222 				if (ip[m_len] != m_pos[m_len])
224 				m_len += 1;
225 				if (ip[m_len] != m_pos[m_len])
227 				m_len += 1;
228 				if (ip[m_len] != m_pos[m_len])
230 				m_len += 1;
231 				if (ip[m_len] != m_pos[m_len])
233 				m_len += 1;
234 				if (unlikely(ip + m_len >= ip_end))
236 			} while (ip[m_len] == m_pos[m_len]);
243 		ip += m_len;
244 		if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET) {
246 			*op++ = (((m_len - 1) << 5) | ((m_off & 7) << 2));
250 			if (m_len <= M3_MAX_LEN)
251 				*op++ = (M3_MARKER | (m_len - 2));
253 				m_len -= M3_MAX_LEN;
255 				while (unlikely(m_len > 255)) {
256 					m_len -= 255;
259 				*op++ = (m_len);
265 			if (m_len <= M4_MAX_LEN)
267 						| (m_len - 2));
270 						&& (m_len >= 261)
271 						&& (m_len <= 264))
279 					ip -= m_len - 260;
280 					m_len = 260;
282 				m_len -= M4_MAX_LEN;
284 				while (unlikely(m_len > 255)) {
285 					m_len -= 255;
288 				*op++ = (m_len);